1992
DOI: 10.1016/0257-8972(92)90200-t
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Al2O3-caoted cemented carbides: optimization of structure, number of layers and type of interlayer

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Cited by 19 publications
(7 citation statements)
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“…Clearly, this must correspond to the thin layer observed optically in this location on the cross-section (Figure 4.7) and the taper section (Figure 4.10) through an ac insert, which, it was stated in Section 6.1.4, it was reasonable to assume corresponds to the Ti30s or Ti 2 0, and possibly Ti0 2 plus the complex Ti(OxCyNz) compound, referred to initially in Section 6.1.1. The bulk grain structure of the preliminary AlP3 coating observed in the present work is comparable with those presented in the literature (see Section 2.8) for AlP3 coatings chemically vapour deposited on uncoated/precoated cemented carbide substrates [16,18,[63][64][65], although the latter are generally finer, having been deposited at reduced total pressures.…”
Section: Fractographysupporting
confidence: 78%
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“…Clearly, this must correspond to the thin layer observed optically in this location on the cross-section (Figure 4.7) and the taper section (Figure 4.10) through an ac insert, which, it was stated in Section 6.1.4, it was reasonable to assume corresponds to the Ti30s or Ti 2 0, and possibly Ti0 2 plus the complex Ti(OxCyNz) compound, referred to initially in Section 6.1.1. The bulk grain structure of the preliminary AlP3 coating observed in the present work is comparable with those presented in the literature (see Section 2.8) for AlP3 coatings chemically vapour deposited on uncoated/precoated cemented carbide substrates [16,18,[63][64][65], although the latter are generally finer, having been deposited at reduced total pressures.…”
Section: Fractographysupporting
confidence: 78%
“…The bulk grain structure of such coatings has been determined by examination of the fracture surfaces using a SEM [16,18,20,64,65]. The procedure employed to prepare such fracture surfaces has not been described, unfortunately, in much of the literature.…”
Section: Effect Of Other Process Variablesmentioning
confidence: 99%
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“…1 On the other hand, oxide coatings such as Al 2 O 3 perform very well at high temperatures, and Al 2 O 3 layers as thick as 0.5 lm were inserted into the nitride coatings in an attempt to solve the oxidation problem under high temperatures. 2,3 Unfortunately, the results were not satisfactory because the addition of oxides would decrease the hardness of coatings.…”
Section: Introductionmentioning
confidence: 93%
“…On the other hand, oxide films such as Al 2 O 3 although perform well at high temperatures; they are low in hardness, resulting in failure when being applied as coatings individually. For instance, Al 2 O 3 layers as thick as 0.5 m were inserted into the nitride coatings in an attempt to solve oxidation problem of the coatings under high temperatures [2,3]. Unfortunately, the results were not satisfactory because the addition of oxides would bring down the overall hardness.…”
Section: Introductionmentioning
confidence: 99%